Occasionally, pressing a key causes nothing to occur, even if the key press is indicated by having the button react visibly, and sometimes the key press causes an action even if the key does not react visibly. I think this is what you mean by "sometimes application needs some time to become active". This phenomenon is more easily observed if you choose "Tap to click" in the Mac's System Preferences > Trackpad.

Also, attempting to set the time (SETIME) crashes the app if you do not enter a time with four digits past the decimal point.

There may be similar problems attempting to set the date (SETDATE). I didn't encounter any but I didn't attempt all date formats.

I think these will be easy fixes for you.

I'm not sure what the Debug registers are meant to represent. Obviously it's intended for your own use but I could not find an obvious way of determining what the display stack registers contain, for instance.

Also: can you have the keys correspond to the Mac's keyboard input (in alpha mode)? The numeric, operation, and Enter keys work as expected but alpha characters don't seem to correspond to anything. I understand the "keyboard shortcuts" (nice) but while in alpha mode, can that be changed to correspond to alpha keys?

Very nice looking emulator. Beautiful. I love the display, even the colors are gorgeous.

(12-06-2014 10:54 PM)Gene Wrote: Gene: Trying to force me to upgrade to 10.10 ? I'll give it a try once I update in a couple of months from 10.9. Many workplaces don't move quickly to have their employees upgrade. :-)

Same for me, I am currently at 10.9.5 and will probably upgrade around Christmas.
Best regards,
Sylvain

Unfortunately OS X 10.10 is mandatory because emulator is written in Swift and uses storyboard which is not supported by 10.9.x. Also I have plan to create calculator notification center widget which is also Yosemite only feature.

After publishing app in Mac Store I will open source, so everyone is welcome to adapt calculator for 10.9.x.